Well casing jack



Aug. 4, 1931. w. D. MOCARLEY 1,317,261

WELL CASING JACK Filed Aug. 16. 1929 2 Sheets-Sheet 1 (542 6 I Pd W19. My Car/e A iiorney Aug. 4, 1931. w. D. McCARLEY 1,817,261

WELL CASING JACK Filed Aug. 16. 1929 '2 Sheets-Sheet 2 Inventor WJ). J far/7 A tiorney Patented Aug. 4, 1931 UNITED STATES PATENT oFFICE WILIAM D. MCCAZRLEY, OF LOERIAINE, TEXAS, ASSIGNOB 'OF ONE-HALF TO CLEMMIE GLASS, OF LO RAINE, TEXAS WELL CASING JACK This invention relates to j aclrs and more particularly to devices of this character which are especially adapted for use in raising or lowering well casings in the well and has for one of its objects to provide, in the manner as hereinafter set forth, a device of the character mentioned, having means embodied therewith for guiding and maintaining the shiftahle pipe gripping ws and their supports in proper positions with respect to the pipes or casings during the opera tion of the .j ack.

Another object of the invention is to provide, in a manner as hereinafter set forth, a jack of t he aforementioned character which may he very expeditiously adjusted to operat-e 'on pipes or casings of varying diameter.

Other objects of the invention are to provide a well casing ack of the character set forth, which will be simple in construction, strong, durable, efficient in its use and which may be manufactured at low cost.

Other objects and advantages of the invention will be apparent from astudy of the following specification taken in connection with the accompanying drawings, wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in side elevation showing the device in operated position with respect to the well casing to be operated upon.

Figure 2 is a top plan view of a well casing jack constructed in accordance with this invention and showing the same in its operated position with respect to the well casing.

Figure 8 is a top plan View of the base portion of the device.

Figure 4 is a view in perspective of one of the pipe gripping jaws.

Referring to the drawings in detail, the reference character 1 designates a well casing, and 2 designates in dotted lines, the lower portion of a conventional derrick which is usually associated with the well 'casing. Besting upon the ground 8 or any other suitable support, and embracing the casing is a base member designated generally by the reference character 4. The base member 4 comprises a pair of spaced opposed parallel Application filed August 16, 1929. Serial No. 388,445.

elongated strips or plates 5 having oppositely disposed outwardly bowed portions '6 intermediate their 'ends for the passage of the casing 1. The elongated strips 5 are maintained in spaced opposed relation by transversely extending retaining bolts or rods 7, adjacent their opposite ends, a pair of steer- 1ng rods or bolts 8 positioned adjacent the opposite ends of the curved portion (3 and a transversely extending bolt or rod 9 positioned i ntermedia'tely *of one of the bolts 8 and the outer end of the strip 5, and as shown in Figures 1 and 3 of the drawings.

The forward rod 8 has pivotally mounted thereon, intermediate the strip 5, a pipe or casing engaging jaw or pawl 10 of the type and configuration shown clearly in Figure 4. The rearward bolt or rod 8 has pivotally mounted thereon, intermediate the strip 5, a casing engaging jaw adapted for coaction with the pawl 10 and which is provided, at its free ends, with an arcuate gripping head or face 12, as shown more clearly in Figure 1,.

The latter jaw is designated by the reference character 1L. As illustrated in Figure 8,

the bolt or red '9 has its opposite end extending laterally beyond the outer side "of the strip 5 and pivotallymounted upon these projecting ends are a pair of spaced opposed vertically disposed uprights or standards 13 which terminate, at their upper ends, in forwardly curved portions 14:. A securing rod or bolt 15 passes transversely through the uprights or standards 13 at a point adjacent their upper ends.

An operating lever is pivotally mounted intermediate its ends upon the bolt o'r rod 15 on the upright 18 and is designated generally by the reference character 16. The operat ing lever 16 comprises a handle portion 17 to the opposite sides of which and at the forward end thereof are secured a pair of opposed metallic extensions 18 to which the rod 15 passes for supporting the handle on the upright 13. I

Forwardly of their points of connection with the standards or uprights 13-, the ex tensions 18 are curved outwardly and then forwardly as shown in Figure2, andterminate at a point above the bowed portions 6 of the base 4.

Pivotally mounted between the extensions 18 and adjacent the free forward end thereof by means of pivot pins 19, are a pair of spaced, opposed, elongated metallic strips 20 having oppositely disposed outwardly bowed portions 21 intermediate their ends and in vertical alinement with the bowed portions 6 of the base 4. The strips 20 are maintained in spaced opposed relation with respect to each other by transversely extending rods 22 and 23.

A pair of opposed co-acting pipe gripplng jaws or pawls 24 are pivotally mounted 'on the rods or bolts 23 intermediate the strip 20 and designated by the reference character 24, said jaws terminating attheir free ends in substantially V-shaped heads 25 which are provided with an arcuate casing engaging head 26, as shown in Figure 4.

The bolt or rod 23 extends laterally beyond the outer faces of the strips 20 and secured rigidly against the outer side of said strips 20 upon the extended end of the bolt 23 are a plurality of downwardly and inwardly extending guide fingers 27, which are adapted to slidably engage the casing during the operation of the jack. The fingers or guides 27 are of an appropriate curvature to facilitate 1 sliding up and down upon the surface of the casing 1, as clearly illustrated in Figure 1. The operation of the jack is as follows: The base 4 is so positioned with respect to the casing 1 that the latter is embraced in the outwardly bowed portion 6 of the strip 5, and the strips 20 are positioned in like manner with respect to the casing. The co-acting jaws 10 and 11 and the pair of jaws 24 are then swung into engagement with the casing and maintained therein by gravity, as will be apparent.

On the downstroke of the handle 17, the

opposite end 18, carrying the gripping jaws 24 and their support 20 move upwardly, said jaws 24 rigidly gripping the casing land raising the same. Upon the downward movement of the lifting mechanism the jaws 24 ride over the surface of the casing and the jaws 10 and 11 rigidly grips the same. Thefingers 27 are constantly in engagement with the outer surface of the casing 1 and maintain the strips 20 and the bowed portion 21 thereof against longitudinal movement relative to the casing as well as retaining said strips in a position at right angles thereto. The supporting standards or uprights 13 oscillate on the supporting pivot bolt 9 when the device is in operation for permitting a true vertical lift to be exerted on the casing 1.

It is believed that the many advantages of a well casing jack constructed in accordance with this invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in details of construction may be had which will fall within the scope of the invention as claimed.

What is claimed as new is:

. A pipe jack of the character described comprising a base including a pair of spaced opposed parallel strips having oppositely disposed outwardly bowed casing embracing portions intermediate their ends, co-acting casing gripping elements pivotally supported between the strips outwardly of the bowed portions thereof, spaced opposed vertically extending uprights pivotally mounted at the lower end and adjacent one end of the base, a lever pivotally connected intermediately its ends between said uprights adjacent their upper ends, said lever including a handle portion and a pair of outwardly and forwardly extending forward end portions, a pair of spaced, opposed parallel strips pivotally secured to the forward end of the handle por tion, said strips, intermediate their ends, being provided with oppositely disposed outwardly bowed casing embracing portions in vertical alinement with the outwardly bowed casing embracing portions of the base, a pair of opposed co-acting casing gripping jaws pivotally mounted between the'opposite ends of said strips and extending inwardly and upwardly thereto, and opposed downwardly and inwardly extending guide fingers rigidly secured to the opposite ends of the strips and adapted to slidably engage the casing in a manner to maintain the last named strips against longitudinal movement relative to the casing.

In testimony whereof I aflix my signature.

' WILIAM D. MOOARLEY. 

